An instrument, employed in triangulation, that uses a mirror to reflect sunlight toward another, very distant, surveyor.
A light purple or violet colour.
Particularly, a purple-flowered plant of the species Heliotropium arborescens.
A bloodstone (a variety of quartz).
The fragrance of heliotrope flowers.
A plant that turns so that it faces the sun.
Light purple or violet.
Keeping one’s face turned toward the sun.
Synonym of radiance.
Time-averaged energy flux (the ratio of average power to the area through which the power "flows"); irradiance.
Can mean any of radiant intensity, luminous intensity or irradiance.
The degree of strength.
The quality of being intense.
The severity of an earthquake in terms of its effects on the earth's surface, and buildings. The value depends on the distance from the epicentre, and is not to be confused with the magnitude.